Gtjmiong device for ribbon-cutting machines



J. H. HOFFMAN.

' GUMMlNG DEVICE FOR RIBBON CUTTING MACHINES.

APPLICATION FILED .IULY26, 1918.

' Patented May 9,1922.

a weflenr W0 m J'OHN'HENRY HOFFMAN, or NEW- YORK, N. Y., ,assrenoa T0 THEO. TIEDEMANN &

sons, me, or. new YoRK','1\I-..Y.,

A'CORPORATIO1\T OFNEW YORK.

GUMMI'NG' nnvrcs'roa RIBBON-CUTTING MACHIN S:

Specification of Letters Batent.

Patented Mayf9, 1922.

Application fi1edJu1y 26, 1918; Serial No. 246,860.

Toall whmmit may concern Be it known that I; JOHN-HENRY Horr- MAN, a citizen of the United States, and aresident of the city of New York, county of' Kings, and State of New York, have invented'certain new and useful Improvements in vice adapted-to be used in conjunction with machines which cut ribbons or strips :of material from piece goods. After this cutting operation has been performed, andthe-ribbon has been-cut, a rough edge is usually left by the rotary cutter generally used for this purpose, and this rough edge has a tendency to fray or fringe. To prevent th 1 s-undesirable unraveling or fringing of the edge of the ribbon, a layer or line of an adhesive substance is usually applied to the newly cut ribbon edge.

The main object of this invention therefore is to provide a gumming apparatus which will readily apply a layer or line of adhesive substance to the edge of the newly cut ribbon during the process of cutting this ribbon. 7

Another object of this invention is to provide a device of this character having means for varying the thickness of the adhesive substance applied to the cutting knife which in turn applies the line of adhesive substance to the edge of the ribbon.

A still further object of my invention is to provide an independent gum applying de vice for the edge of a rotary cutter whereby cutters of varying sizes may be kept into contact with the gum applying mechanism so that a uniform amount of gum is at all times applied to each cutter.

WVith these and other objects which may hereinafter appear in view, I have devised the particular arrangement of parts hereinafter set forth, and more particularly pointed out in the claims appended hereto.

Referring to the accompanying drawing forming a part hereof,

Figure 1 is a plan view of a portion of a ribbon cutter provided with my improved gumming device;

Figure 2 is a side elevation of the same;

Figure 3 is a sectional view on the line 3-3 of Figure 1, looking in the direction of the arrows; and

Figure 4 is a sectional view on the line 4- 1 of Figure 2, looking inthetdirection of the arrows. I

Throughout the variousviews of the drawings, similar reference characters designate similar parts: p

In the-preferredembodiment of my in-- vention as illustrated in the accompanying drawing, 1 indicates therotary cutting knife.

Thisknifeis mounted in a supporting member- Qof the usual kind and in which the knifeis adapted to rotate upon its axis 3. In the ribbon ,cutting'machines in general use, the material to be cut generally passes over a roller situated abovethe cutter 1 and as this material passes'between the rotary cuttei l-iand the roller about which itpasses, it

is-cut'into ribbons or strips by the cutter 1.

These cuttters are generally'adjustable or regulatable upon a shaft so that they may be stationed at-desired distances apart to cut the ribbons into desired widths.

Beneath the cutters I provided a gumcontaining trough 4: which holds the gum 5, in liquid form, and above the trough is a shaft 5 upon which the gum applying mechanism is supported. Each gum applying device consists of a bar 6, which is slotted adjacent one of its ends as at 7, and rotatably mounted in said slot on a pin Sis the gum applying roller 9. The lower end of this roller dips into the gum o and as the roller contacts with the rotary cutter which is placed above it, it is thus'rotated, and as it rotates through the gum 5, its edge is constantly covered with the gum, which it in turn applies to the edge of the cutting knife 1.

In order to distribute the gum evenly upon the surface of the roller 9, I provide a finger 10 which is adjustable to and from the roller 9. By the use of this finger the thicknessof the gum upon the face of the roller 9 may be varied as desired by adjustment of this finger 10 to and from the roller 9 as desired. The regulation of the finger 10 is performed by means of a screw 11 passing through the end of the bar 6 and having its end bearing against the finger l0 and adapted to force the same inwardly towards the roller when desired. The finger 10 is supported in a bracket or projection 12 which extends from the end of the bar 6. The bar 6 is pivotally mounted on a bushing 13 which is provided with a nut 14 to hold the same in position on the shaft 5. The shaft 5 is threaded and this bushing is threaded thereon and it may be moved on said shaft 5 to push the bar 6 to any desired place on the shaft.

It will thus be seen that the bar 6 with its gum applying roller may be placed on the shaft 5 as desired, and can be positioned beneath any rotary cutter. The outer end of the bar 6 is narrowed and adjustable on said narrowed portion is a weight or counterpoise which, by the force of gravity,keeps the gum applying roller 9 in contact with the edge of the cutter 1 so that gum is at all times applied to the edge of the cutter. Additionally when the cutters are of varying sites this weight moves the gum applying roller 9 upward so that a roller is constantly in contact with each cutter, so that the application of gum to the edge of each cutter by each independent roller is assured.

The narrowed portions on the end of each bar 6 permit the bars and gumming rollers thereon to be brought close together without interference with one another when ribbons of a very narrow width are being out.

It will thus be seen that the gum is constantly applied to the edge of the cutter so that while the cutting operation is performed the cutter is applying gum to the edge of the cut ribbon whereby the undesirable fraying of the edge is avoided.

From the foregoing, it is obvious that my invention is not to be restricted to the exact embodiment shown but is broad enough to cover all structures coming within the scope of the annexed claims.

Having thus described my invention, what I claim is:

1. A gumming apparatus for ribbon to be cut into strips, comprising the combination of a rotary cutter, a roller adapted to bear frictionally against said cutter, a pivoted bar in which said roller is rotatably mounted, said bar having a reduced outer end and a weight slidably adjustable on said reduced portion. a

2. A gumming apparatus for material to be out into strips, comprising the combination of a plurality of rotary cutters, a roller adapted to be held in frictional rolling contact with each of said cutters, a bar in which each of said rollers is rotatably mounted, a support for said bars, the bars being held on said support in side by side relationship, means for regulating the spaced relation of said bars, each of said bars having its free end reduced in thickness to form a portion narrower than the remainder of the bar and a weight slidably adjustable on said reduced portion.

Signed at the city, county and State of New York, this 23rd day of July, 1918.

JOHN HENRY HOFFMAN. 

